Medium-Pressure Diaphragm Pump DP-139

  • 3-diaphragm design.
  • Ideal for agriculture and industrial use including horticulture, lawn care, nursery, car wash, air blast orchard/vineyard and poultry houses.
  • Various mounting options that make them convenient to mount on sprayers with a PTO drive or can be equipped with either gasoline, electric or hydraulic motors.
  • All fluid ends are anodized aluminum.
  • Check valves are stainless steel, ideal for protection against most harsh chemicals and abrasion.
  • All moving parts are completely submerged in oil, which increases the reliability of the pump.
  • Diaphragms are constructed from chemical resistant elastomers that ensure a long pump life even when used with aggressive chemicals.



Model Description Max Flow GPM Max Pres. PSI Max Speed RPM Max Power HP Max Temp. ° F Suct. Hose Diam. Disch. Hose Diam. Weight LB Lube Oil
DP-139 3 diaphragms 13.9 @ 550 RPM & 145 PSI 580 550 5.6 140° F 1-1/4″ Hose 1/2″ NPT 30.8 30 SAE


NEW DP-139-GRI: Includes gearbox to fit 3.5 and 5 HP engines and SC-1132-2 regulator


  • SC Series: Spray Guns and Lances.
  • SC-1241-2: Pressure Regulator.
  • SC-1240-3: Pressure Regulator.
  • DP-321009: Gearbox for 3.5 and 5 HP Engines.
  • DP-318724: Gearbox for 8 and 11 HP engines.
  • Pump has crankshaft flange on one side, 1-3/8″ spline shaft opposite side. Must order solid shaft separately (DP-318793 for 3/4″ solid shaft) or (DP-318590 for 1″ solid shaft).
  • DP-31874897: Hydraulic Adapter (SAE “B”).